Maurice B. Clark (1827–1901) was a partner in a produce business with John D. Rockefeller Sr., along with Clark's two brothers, James and Richard.G. Richard Shell, Mario Moussa, The Art of Woo: Using Strategic Persuasion to Sell Your Ideas (2007), p. 51. Clark was from Malmesbury, England and moved to the United States in 1847. He studied with Rockefeller at Folsom's Commercial College in Ohio.
His business career began with the firm of Otis & Sinclair. He entered into a partnership with John D. Rockefeller in 1856, forming a grain and produce business named Clark & Rockefeller. In 1858, a new partner was added, George W. Gardner, later Mayor of Cleveland, Ohio, and the Rockefeller name was removed to become Clark, Gardner & Company until 1862.John D., A Portrait in Oils, John. K. Winkler, The Vanguard Press, New York, June, 1929, p. 50-56
They had become the largest grain dealers in Cleveland.All 50 mayors in Cleveland history -- and their claim to fame, Cleveland, Peter Krouse, July 25, 2017 Gardner withdrew from the partnership and it became Clark & Rockefeller once more; other partners were added later, and the firm became Clark, Rockefeller, & Co in 1864. During the American Civil War (1863), the two partners went into the oil business. Eventually, Rockefeller bought Clark's (and his brothers') share of the company at auction for $72,500.
Following this, Clark went on to start another oil company, the Star Oil Company, which passed through several names and changes of partner, becoming Clark Brothers & Co, and Clark, Payne, & Co. In 1868, he joined new partners to form the Clark, Schurmer, & Scofield Company, which then became Clark, Scofield, and Teagle. Following his work in the oil industry, he helped to organize the Cleveland Co-operative Stove Company. At the time of his death, he presided over the board of directors and he had been the company's president for twenty years.
In addition to his work in the business community, he served one term in the City Council of Cleveland, representing the "old fourth ward" from 1872 to 1873. He was also a prominent abolitionist, and one of the charter members of the First Wesleyan Methodist Church, known for its abolitionist outlook.
References
Titan: The Life of John D. Rockefeller, Sr., Ron Chernow, Random House, 1998.